RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-10-21 03:53:04 +02:00
Code Issues Projects Releases Wiki Activity

[InstSimplify] add/move tests for add folds; NFC

Browse Source 
isKnownNegation() is currently proposed as part of D48754,
but it could be used to make InstSimplify stronger independently
of any abs() improvements.

llvm-svn: 336822
This commit is contained in:
Sanjay Patel 2018-07-11 16:52:18 +00:00
parent c6d2c0ed8a
commit fe6a0d2f83
2 changed files with 57 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
test/Transforms/InstCombine/sub.ll
View File

@ -250,15 +250,6 @@ define i64 @test18(i64 %Y) {
ret i64 %tmp.8
}
define i32 @test19(i32 %X, i32 %Y) {
; CHECK-LABEL: @test19(
; CHECK-NEXT: ret i32 [[X:%.*]]
;
%Z = sub i32 %X, %Y
%Q = add i32 %Z, %Y
ret i32 %Q
}
define i1 @test20(i32 %g, i32 %h) {
; CHECK-LABEL: @test20(
; CHECK-NEXT: [[TMP_4:%.*]] = icmp ne i32 [[H:%.*]], 0

57
test/Transforms/InstSimplify/add.ll Normal file
View File

@ -0,0 +1,57 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
define i32 @common_sub_operand(i32 %X, i32 %Y) {
; CHECK-LABEL: @common_sub_operand(
; CHECK-NEXT: ret i32 [[X:%.*]]
;
%Z = sub i32 %X, %Y
%Q = add i32 %Z, %Y
ret i32 %Q
}
define i32 @negated_operand(i32 %x) {
; CHECK-LABEL: @negated_operand(
; CHECK-NEXT: ret i32 0
;
%negx = sub i32 0, %x
%r = add i32 %negx, %x
ret i32 %r
}
define <2 x i32> @negated_operand_commute_vec(<2 x i32> %x) {
; CHECK-LABEL: @negated_operand_commute_vec(
; CHECK-NEXT: ret <2 x i32> zeroinitializer
;
%negx = sub <2 x i32> zeroinitializer, %x
%r = add <2 x i32> %x, %negx
ret <2 x i32> %r
}
define i8 @knownnegation(i8 %x, i8 %y) {
; CHECK-LABEL: @knownnegation(
; CHECK-NEXT: [[XY:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[YX:%.*]] = sub i8 [[Y]], [[X]]
; CHECK-NEXT: [[R:%.*]] = add i8 [[XY]], [[YX]]
; CHECK-NEXT: ret i8 [[R]]
;
%xy = sub i8 %x, %y
%yx = sub i8 %y, %x
%r = add i8 %xy, %yx
ret i8 %r
}
define <2 x i8> @knownnegation_commute_vec(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @knownnegation_commute_vec(
; CHECK-NEXT: [[XY:%.*]] = sub <2 x i8> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[YX:%.*]] = sub <2 x i8> [[Y]], [[X]]
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[YX]], [[XY]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%xy = sub <2 x i8> %x, %y
%yx = sub <2 x i8> %y, %x
%r = add <2 x i8> %yx, %xy
ret <2 x i8> %r
}